Out of Range and Back into Range with Data Accumulation Mode On

The image scanner may store a number of symbols (approximately 500 UPC symbols, others may vary) when out of range and then send them to the base when back in range. You will not hear a communication error beep in this mode, but you will hear a short buzz when you pull the trigger if the radio communication is not working. Once the radio connection is made, the image scanner produces a series of beeps while the data is being transferred to the base.

Communication Between the Cordless System and the Host

The cordless image scanner provides immediate feedback in the form of a “good read” indication (a green LED on the image scanner and an audible beep) after a bar code is scanned correctly and the base has acknowledged receiving the data. This is possible since the cordless system provides two-way communication between the image scanner and the base.

When data is scanned, the data is sent to the host system via the base unit. Confirmation from the host system or the base indicates that the data sent was received by the host. The cordless image scanner recognizes data acknowledgement (ACK) from the base unit. If it cannot be determined that the data has been properly sent to the base, the image scanner issues an error indica- tion. You must then check to see if the scanned data was received by the host system.

1) Good Read

3)Base sends data to host

2) ACK from base

Connecting the Base When Powered by Host (Keyboard Wedge)

A base can be connected between the keyboard and PC as a “keyboard wedge,” plugged into the serial port, or connected to a portable data terminal in wand emulation or non decoded output mode. The following is an example of a keyboard wedge connection:

1. Turn off power to the terminal/computer.

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